A ceasefire in Lebanon appears to have revived negotiations. US envoy Steve Witkoff flew out to join President Donald Trump's son-in-law Jared Kushner in Switzerland on Friday. They will meet Iranian Foreign Minister Abbas Araghtchi. The US and Iran signed a memorandum earlier this week to stop the war, with implementation yet to be ironed out. Details by FRANCE 24 correspondent in Iran, Reza Sayah.